<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="UTF-8" />
		<meta name="viewport" content="width=device-width, initial-scale=1.0" />
		<title>挂载与更新</title>

    <style>
      #foo{
        width: 200px;
        height: 200px;
        background-color: pink;
      }
    </style>
	</head>
	<body>
		<div id="app"></div>

		<!-- 引入 Vue Reactivity 库 -->
		<script src="https://unpkg.com/@vue/reactivity@3.0.5/dist/reactivity.global.js"></script>
    
    <script src="normalizeClass.js"></script>
    <script src="get-sequence.js"></script>
		<script  src="index.js"></script>
	</body>
</html>
